Microbiological aspects

BS 8580:2010 Water quality. Risk assessments for Legionella control. Code of practice

The ubiquitous occurrence of Legionella spp. means that all water systems are susceptible to contamination with legionellae.

This standard gives recommendations and guidance on the assessment of the risk of legionellosis presented by artificial water systems. It is applicable to any undertaking involving a work activity or premises controlled in connection with a trade, business or other undertaking where water is used or stored in circumstances that could cause a reasonably foreseeable risk of exposure to legionellae and contracting legionellosis.

The standard is applicable to risk assessments being undertaken on premises, plant and systems for the first time, but also includes how to review and audit where a previous assessment has been undertaken and where control measures might have been implemented.

BS 8580 provides independent risk assessors, regulators, facility managers and other duty holders with a guide describing the processes required to produce a Legionella risk assessment in a range of environments, including:

  • Industrial cooling waters
  • Hospitals, nursing homes and care homes
  • Leisure centres
  • Water distribution and use within buildings
  • Commercial and industrial uses of water
  • Power generation
  • Horticultural water

BSI standards on the microbiological aspects of water quality are regarded as best practice for environmental aqueous matrices where microbial contamination can indicate hazards to health and/or treatment issues.

These standards are used by environmental laboratories and consultants involved in regulatory analyses that meet the Water Framework Directive, regulatory compliance monitoring (for agencies such as the Environment Agency, Drinking Water Inspectorate and local Environmental Health Departments) and contract testing for industries such as water treatment, healthcare, swimming snd other pools and food production.
 
These standards are based on those developed by ISO and CEN so provide comparable results, whichever laboratory uses them. Use of such standard methods is essential for comparing historical data and trends throughout the UK. In addition the UK has developed some national standards which are likely to be picked up by these international bodies in due course. Examples of these are BS 8496 Water Quality - Enumeration of micro-organisms in water samples – Guidance on the estimation of variation of results with particular reference to the contribution of uncertainty of measurement and ones involving the sampling and risk assessments for Legionella control, BS 7592 & BS 8580 respectively.

Related standards:

DD ENV ISO/TR 13843:2001
Water quality. Guidance on validation of microbiological methods

BS EN ISO 19458:2006
Water quality. Sampling for microbiological analysis

BS 8496:2007
Water quality. Enumeration of micro-organisms in water samples. Guidance on the estimation of variation of results with particular reference to the contribution of uncertainty of measurement

More information and the full list of standards can be found at the BSI shop.


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BS 8580:2010

Water quality. Risk assessments for Legionella control. Code of practice